SU1527434A1 - Single-wave toothed gearing - Google Patents

Abstract

The invention relates to mechanical engineering and instrument making, in particular to wave gears. The aim of the invention is to increase the lifetime of a single wave gear by reducing the stresses in the flexible wheel. For this, the profile of a cam wave generator, which deforms the flexible wheel during its rotation, is outlined in cross section by four adjoining arcs of circles A, B, C and D and characterized by certain geometrical parameters. 2 Il.

Description

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FIELD OF THE INVENTION The invention relates to mechanical engineering and instrument making, in particular, to volumetric gears.

The purpose of the invention is to increase the life of a single wave gear by reducing the stresses in the flexible wheel.

FIG. 1 is a diagram of a single wave gear; in fig. 2 - cam wave generator (without rolling elements), cross section.

The transmission contains a rigid wheel 1, a flexible wheel 2 interacting with it, the number of teeth of which differs by one from the numbers of teeth of the hard wheel 1, and a cam generator of 3 waves, equipped with rolling bodies 4. The profile of the cam generator 3 waves B of the cross section is outlined by four conjugate circular arcs (arcs A, B, C and D) with the radius R, V., R, R

., built

mi on the corners of q ,,, Wed, -p, j. from the respective centers O, OR, O f; and 0,

The generator profile is symmetric about the axis 1-1 and therefore the parameters of arc B and arc D, conjugated with arc A, are the same, i.e. , Cpj -P ,,, and center 0 ((symmetrical with target 0c,. At that, arc A is located at an angle C, equal to 80-160, with center OR, combined with the center of rotation of the generator.

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The boundary values of the angle C are selected according to the criterion of the absence of interference of the profiles in the gearing engagement, which is eliminated by reducing the heights of the heads of the teeth of the wheels (coefficient b 0.5-0.7 for fine-grained gears). A smaller value of the angle (J / 80 corresponds to BD 0.5, a larger value of the angle (J (, 160 ° corresponds to h 0.7.

The remaining geometrical parameters of the 3-wave cam oscillator profile are selected from the following relationships:

R,

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(one)

Rr

-u -Lj niSliRv 4/2. (7-tf, / 2- L "/ Rj)

(2)

, -u + f (R, -R) () 2 (R, -Ri) (R, -Ri) cos (4, / 2 + 4 i / 2)

(3)

, Ts; ,.,. zbo -.,: y,

(four)

(five)

Where

Z, Z 2

0

0

five

five

R, R.R., R are the radii of arcs of conjugate circles. Outline profile cam wave generator, 4 i, M g. central corners

on which are located the corresponding arcs of conjugate surroundings; the number of teeth, respectively, of flexible and rigid wheels; the inner diameter of the flexible wheel (in formula (1) the presence of rolling bodies 4 in the generator of 3 waves is not taken into account);

 I

 H ijH- 2

Bk

§ 0.1-0.5 0

five

0

five

semi-perimeter of the outer surface of the cam wave generator; a parameter depending on the type of transmission (a larger value corresponds to kinematic gears, a smaller value - to power),

L (1.1-1.3) t is the increment of the radius, the vector of the profile of the cam wave generator (a smaller value corresponds to kinematic transmissions, and a larger one to power). where m is the transmission engagement module.

The transmission works as follows.

When the generator rotates, the 3 waves of the body 4 roll deform the flexible wheel 2, which due to the difference in the numbers of teeth with the hard wheel 1 converts the deformation into rotational movement depending on which transmission wheel is stopped by either the flexible wheel 2 or the hard wheel 1.

Claims (1)

The claims A single-wave gear transmission containing a rigid and flexible wheel with a tooth difference of one unit and a cam wave generator, made with the purpose of a wheel, of waves of four conjugate arcs of circles, of which the first is located at an angle of 80-160 ° with the center , combined with the center of rotation of the generator, the lengths of the arcs associated with the first are the same and are characterized by geometric parameters selected from wears: 0.1-0.5 ZBO ^ Cf. ₌ , the radii of the arcs of the conjugate circles, delineating the profile of the cam will generator; central angles at which the corresponding arcs of conjugate circles are located; the number of teeth, respectively, flexible and hard wheels; the diameter of the flexible wheel; L = (1.1-1.3) m half-perimeter of the outer surface of the cam wave generator * parameter depending on the transmission type; radius increment - profile vector of the cam wave generator, gear mesh.